Date: Fri, 7 Apr 2017 17:04:43 +0200 From: "Patrick M. Hausen" <hausen@punkt.de> To: freebsd-fs@freebsd.org Subject: iSCSI/ZVOL: ZFS or UFS on the initiator side? Message-ID: <35CF60B2-097A-4381-9B4A-ABF2B9BBC0B9@punkt.de>
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Hi, all, a general question: If I export a ZVOL via iSCSI to be used be another FreeBSD machine as a block device, is it advisable to use ZFS or should I stick to UFS? I don't have any reason to believe that ZFS might be harmful. I just know from experience, that e.g. tunneling TCP through TCP can lead to strange effects if you happen to really have packet-loss. Anything similar for ZFS in ZFS? What if iSCSI target (ZVOL) and initiator are on the same machine? They'll share ZIL and ARC. What if memory gets low? I'm investigatiing the feasibility of creating a HA setup by running a mirror (ZFS or gmirror/UFS) on top of 2 iSCSI ZVOLs, one on the local machine but still via ISCSI, one on a remote machine ... TIA for your opinion and advice, Patrick --=20 punkt.de GmbH * Kaiserallee 13a * 76133 Karlsruhe Tel. 0721 9109 0 * Fax 0721 9109 100 info@punkt.de http://www.punkt.de Gf: J=C3=BCrgen Egeling AG Mannheim 108285
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